If you experience any of the following you should go to the nearest hospital emergency department as soon as possible: 1  Heavy bleeding (soaking two pads every hour and/or passing golf ball sized clots) 2  Severe abdominal pain or shoulder pain. 3  Fever or chills. 4  Dizziness or fainting. 5  Vaginal discharge that smells unpleasant.
One of the most famous emission nebulae is the Orion Nebula (M42) located just below Orionâs belt. Another common type of emission nebula is a planetary nebula. These objects consist of a central white dwarf star surrounded by clouds of gas released as the original star evolved to the white dwarf phase.
Hubble image of emission nebula NGC 2174. Some of the most prominent emission nebulae visible from the northern hemisphere are the North America Nebula (NGC 7000) and Veil Nebula NGC 6960/6992 in Cygnus, while in the south celestial hemisphere, the Lagoon Nebula M8 / NGC 6523 in Sagittarius and the Orion Nebula M42.